Jeff Moden (10/26/2016)
p.s. As for ascertaining the recommended size for the log files, you could write a script to (for each DB)...1. Set the SIMPLE recovery model.
2. Change the initial size and growth of each log file to 100MB each.
3. Shrink the log file to 0 (don't worry about pregrowing it here, it'll grow)
4. Set the FULL recovery model.
5. Wait for a week.
After a week passes, the log files will have grown because of the FULL recovery model. ...<snip>
This could blow the size (and fill up the filesystem) quickly on a busy system!! Unless you perform regular LOG backups (which is not mentioned in the above steps ;-)). Regular LOG backups determine the final size of the LOG backup, depending on the frequency of the backups.
I would skip step 4 and leave the database in SIMPLE recovery. After a week I would determine the size as to the size after a week plus an additional 20% or 30%.